Hi All
I am trying to upgrade stand-alone ArcGIS Server 10.6.1 to 10.8. When running the installer it correctly detects the previous install on E drive and prompts the user to rename the directory and rerun installer.

After rerun of the installer, it defaults the install files to C drive instead of E drive. Upgrade completes successfully but on loading the server manager we see a new install screen:

Any ideas as to why this might be occurring?
Thanks,
Orlo